/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2014, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.styling.css;

import java.util.Collections;
import java.util.Comparator;

/**
 * Orders rules by their selector selectivity
 *
 * @author Andrea Aime - GeoSolutions
 */
class CssRuleComparator implements Comparator<CssRule> {

    public static final CssRuleComparator ASCENDING = new CssRuleComparator();

    public static final Comparator<CssRule> DESCENDING = Collections.reverseOrder(ASCENDING);

    private CssRuleComparator() {}

    @Override
    public int compare(CssRule o1, CssRule o2) {
        return o1.getSelector().compareTo(o2.getSelector());
    }
}
